US Bridges

Il 104 over Norfolk Southern Ry.

Fair

Morgan County, Illinois · .5M S Il 78 Jacksvl · Structure no. 069001900000000

Built
1961
64 years old, rebuilt 2003
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
144 ft
3 main spans
Daily traffic
2,150
2023 count
Owner
State
State Highway Agency

About this bridge

Il 104 over Norfolk Southern Ry. is a steel continuous stringer/multi-beam or girder carrying Il 104 over Norfolk Southern Ry. in Morgan County, Illinois. It was built in 1961 and reconstructed in 2003, so it is 64 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,150 vehicles a day, roughly 7% of them trucks, projected to reach 2,424 by 2046. The structure is 144 ft (43.9 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesIl 104
CrossesNorfolk Southern Ry.
Location.5M S Il 78 Jacksvl
RouteState Highway 104
CountyMorgan County
StateIllinois
Coordinates39.7453, -90.27339
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.1 US tons
Inventory rating57.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length144 ft (43.9 m)
Longest span52 ft (15.8 m)
Deck width39 ft (11.8 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,150 (2023)
Projected traffic2,424 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Il 104 over Norfolk Southern Ry. built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2003.

What condition is Il 104 over Norfolk Southern Ry. in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does Il 104 over Norfolk Southern Ry. carry?

About 2,150 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 104 over Norfolk Southern Ry.?

The structure is 144 ft (43.9 m) long with a longest span of 52 ft (15.8 m) and a deck 39 ft wide.

Who owns Il 104 over Norfolk Southern Ry.?

It is owned by the State Highway Agency.